Garfield: No it wouldn’t. Every time a lightbulb burned out it would be like a death in the family.

This is largely what is wrong with the idea of sentient disposable objects – to wit, if they really are sentient, your characters have exactly two options: either love them and care for them and be heartbroken all the time, or be callous bastards. (Or, you know, psychotic satsujin angels. I was assuming they weren’t doing the killing themselves, but the world of anime is large.)